register(_:forHeaderFooterViewReuseIdentifier:)
Registers a nib object that contains a header or footer with the table view under a specified identifier.
Declaration
func register(_ nib: UINib?, forHeaderFooterViewReuseIdentifier identifier: String)Parameters
- nib:
A nib object that specifies the nib file to use to create the header or footer view. This parameter can’t be
nil. - identifier:
The reuse identifier for the header or footer view. This parameter must not be
niland must not be an empty string.
Discussion
Before dequeueing any header or footer views, call this method or the register(_:forHeaderFooterViewReuseIdentifier:) method to tell the table view how to create new instances of your views. If a view of the specified type isn’t currently in a reuse queue, the table view uses the provided information to create a new one automatically.
If you previously registered a class or nib file with the same reuse identifier, the nib you specify in the nib parameter replaces the old entry. You may specify nil for nib if you want to unregister the nib from the specified reuse identifier.